On Tue, Apr 17, 2018 at 11:37 AM, Richard Hesketh <richard.hesketh@xxxxxxxxxxxx> wrote: > Yes, that's what I did - as long as you don't affect the OSD data/partitions, they should come up again just fine once you reinstall ceph. I expect once the mandatory switch to ceph-volume finally happens this process might get a little more complicated but for jewel you're still using ceph-disk so it's just using udev rules to identify the OSDs and it will bring them up at start. Just a quick note here that ceph-volume has the ability to take over ceph-disk OSDs, by taking over the systemd units and disable the somewhat problematic UDEV rules. http://docs.ceph.com/docs/master/ceph-volume/simple/#ceph-volume-simple The process is rather simple, and there is support for the various different OSDs that ceph-disk would create (dmcrypt, plain, etc...) > > Rich > > On 17/04/18 15:50, Shain Miley wrote: >> Rich, >> >> Thank you for the information. Are you suggesting that I do a clean install of the OS partition...reinstall the Ceph packages, etc...and then Ceph should be able to find the OSDs and all the original data. >> >> I did do something similar one time when we had a MBR failure on a single node and it would no longer boot up..however that was quite some time ago. >> >> As far as I remember Ceph found all the OSD data just fine and everything did startup in a good state post OS reinstall. >> >> Thanks again for your help on this issue. >> >> Shain >> >> >> On 04/17/2018 06:00 AM, Richard Hesketh wrote: >>> On 16/04/18 18:32, Shain Miley wrote: >>>> Hello, >>>> >>>> We are currently running Ceph Jewel (10.2.10) on Ubuntu 14.04 in production. We have been running into a kernel panic bug off an on for a while and I am starting to look into upgrading as a possible solution. We are currently running version 4.4.0-31-generic kernel on these servers and have run across this same issue on multiple nodes over the course of the last 12 months. >>>> >>>> My 3 questions are as follows: >>>> >>>> 1)Are there any known issues upgrading a Jewel cluster to 16.04? >>>> >>>> 2)At this point is Luminous stable enough to consider upgrading as well? >>>> >>>> 3)If I did decide to upgrade both Ubuntu and Ceph..in which order should the upgrade occur? >>>> >>>> Thanks in advance for any insight that you are able to provide me on this issue! >>>> >>>> Shain >>> When Luminous came out I did a multipart upgrade where I took my cluster from 14.04 to 16.04 (HWE kernel line), updated from jewel to luminous and migrated OSDs from filestore to bluestore (in that order). I had absolutely no issues throughout the process. The only thing I would suggest is that you reinstall your nodes to 16.04 rather than release-upgrading - previous experience with trying to release-upgrade on other hosts was sometimes painful, rebuilding was easier. >>> >>> Rich > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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